<?php
namespace app\controller\admin;

use app\BaseController;
use think\facade\Db;
use think\facade\Request;

/**
 * 数据概览控制器（普通管理员）
 */
class Dashboard extends BaseController
{
    /**
     * 获取统计数据
     * @return \think\response\Json
     */
    public function index()
    {
        $user = $this->request->user ?? null;
        
        if (!$user) {
            return error('未登录', 401);
        }

        // 验证是否为管理员
        if (!in_array($user['role'], ['admin', 'enterprise_admin'])) {
            return error('无权限访问', 403);
        }

        try {
            // admin / enterprise_admin 均只统计本企业数据
            $enterpriseId = $user['enterpriseId'] ?? null;
            if (!$enterpriseId) {
                $adminRow = Db::name('users')->where('id', $user['userId'] ?? 0)->find();
                $enterpriseId = $adminRow['enterpriseId'] ?? null;
            }

            // 企业用户 ID 集合（用于后续统计个人版测试）
            $enterpriseUserIds = [];
            if ($enterpriseId) {
                $enterpriseUserIds = Db::name('wechat_users')
                    ->where('enterpriseId', $enterpriseId)
                    ->column('id');
                $enterpriseUserIds = array_values(array_filter($enterpriseUserIds));
            }

            // 总用户数：wechat_users.enterpriseId = 本企业
            if ($enterpriseId) {
                $totalUsers = count($enterpriseUserIds);
            } else {
                try {
                    $totalUsers = (int) Db::name('wechat_users')->count('openid', true);
                } catch (\Throwable $e) {
                    $totalUsers = (int) Db::name('wechat_users')->count();
                }
            }

            // 已完成测试数：严格按 test_results.enterpriseId 归属企业统计
            if ($enterpriseId) {
                $testsCompleted = (int) Db::name('test_results')
                    ->where('enterpriseId', $enterpriseId)
                    ->count();
            } else {
                $testsCompleted = (int) Db::name('test_results')->count();
            }

            // 今日活跃用户数
            $todayStart = strtotime(date('Y-m-d 00:00:00'));
            $todayEnd = strtotime(date('Y-m-d 23:59:59'));
            $activeQuery = Db::name('test_results')
                ->where('createdAt', '>=', $todayStart)
                ->where('createdAt', '<=', $todayEnd);
            if ($enterpriseId) {
                $activeQuery->where('enterpriseId', $enterpriseId);
                $activeIds  = $activeQuery->distinct(true)->column('userId');
                $activeToday = count(array_filter($activeIds));
            } else {
                $activeIds  = $activeQuery->distinct(true)->column('userId');
                $activeToday = count(array_filter($activeIds));
            }

            // 待审核（暂返回0）
            $pendingReviews = 0;

            // 最近 14 天测试趋势
            $days = 14;
            $startDate = strtotime(date('Y-m-d 00:00:00', strtotime('-' . ($days - 1) . ' days')));
            $trendQuery = Db::name('test_results')
                ->where('createdAt', '>=', $startDate)
                ->whereIn('testType', ['face', 'mbti', 'disc', 'pdp']);
            if ($enterpriseId) {
                $trendQuery->where('enterpriseId', $enterpriseId);
            }
            $trendRows = $trendQuery
                ->field("FROM_UNIXTIME(createdAt, '%Y-%m-%d') as d, testType, COUNT(*) as c")
                ->group('d,testType')
                ->order('d', 'asc')
                ->select()
                ->toArray();

            // 组装为按日期汇总的数组
            $trendMap = [];
            foreach ($trendRows as $row) {
                $d = $row['d'];
                $type = $row['testType'];
                $cnt = (int) ($row['c'] ?? 0);
                if (!isset($trendMap[$d])) {
                    $trendMap[$d] = [
                        'date'  => $d,
                        'face'  => 0,
                        'mbti'  => 0,
                        'disc'  => 0,
                        'pdp'   => 0,
                        'total' => 0,
                    ];
                }
                if (in_array($type, ['face', 'mbti', 'disc', 'pdp'], true)) {
                    $trendMap[$d][$type] += $cnt;
                    $trendMap[$d]['total'] += $cnt;
                }
            }

            // 补齐没有数据的日期
            $trendData = [];
            for ($i = 0; $i < $days; $i++) {
                $d = date('Y-m-d', strtotime('-' . ($days - 1 - $i) . ' days'));
                if (isset($trendMap[$d])) {
                    $trendData[] = $trendMap[$d];
                } else {
                    $trendData[] = [
                        'date'  => $d,
                        'face'  => 0,
                        'mbti'  => 0,
                        'disc'  => 0,
                        'pdp'   => 0,
                        'total' => 0,
                    ];
                }
            }

            return success([
                'totalUsers' => $totalUsers,
                'testsCompleted' => $testsCompleted,
                'activeToday' => $activeToday,
                'pendingReviews' => $pendingReviews,
                'testTrends' => $trendData,
            ]);
        } catch (\Exception $e) {
            return error('获取统计数据失败：' . $e->getMessage(), 500);
        }
    }

    /**
     * 格式化时间
     * @param int $timestamp
     * @return string
     */
    private function formatTime($timestamp)
    {
        if (!$timestamp) {
            return '';
        }

        $now = time();
        $diff = $now - $timestamp;

        if ($diff < 60) {
            return '刚刚';
        } elseif ($diff < 3600) {
            return floor($diff / 60) . '分钟前';
        } elseif ($diff < 86400) {
            return floor($diff / 3600) . '小时前';
        } elseif ($diff < 604800) {
            return floor($diff / 86400) . '天前';
        } else {
            return date('Y-m-d H:i', $timestamp);
        }
    }
}